Vibratory apparatus



Jan. 17, 1939. H. E. WURZBACH ET AL A 2,

VIBRA'I'ORY APPARATUS Filed Nov. 25, 1935 INVENTORi! Jn bLi W rz ac C(ydeflilfonold,

' AITTO 1v YS.

Patented Jan. '17, 1939 S PATENT OFFICE 'vmmrronr APPARATUS Hugh E. Wurzbach and Clyde 1!. Konold,

Application November 23, 1935, Serial No. 51,305

2 Claims. (Cl. 209-368,)

This invention relates to vibratory apparatus, and pertains particularly to means for imparting an accentuated vibratory motion from a vibratory motor means to a feeding device, screening device, shaker device, or the like, and one of the principal objects thereof is to provide a means for resiliently driving a vibrated member by a reciprocating motor means of fixed stroke, in such manner that an accentuated vibrated motion is obtained in the vibrated member.

A further object of the invention is to provide for transmitting a reciprocating movement from a vibratory motor means offixed stroke to a vibrated member in such manner as to obtain a whip action at the point or points where the vibratory movement is applied to the vibrated member. A further object of the invention is to provide aconstruction in which a vibrated meniber is mounted on resilientmounting means in- N dependently of the particular mounting of a vibratory motor means whereby the amplitude of vibratory movement of the vibrated member is not limited to the amplitude of vibratory movement of said motor means.

In our issuedU. Sq. Patent No. 1,945,015, we have described a form of vibratory motor means useful according to the present invention, and

the following description pertains to a vibratory motor means of such type, but it will be appreciated that the phase of the invention pertaining to the disposition of such motor means with respect to the vibrated member, and the mounting of the vibrated member as hereinafter described, are not limited in application to this specific type of motor means, as we may also use other types of vibratory motor means which are adapted to produce forcible vibratory movements.

The device of the present invention may comprise a. vibrated member provided with a vibratory motor means operatively associated therewith in driving relation through the agency of a resilient driving member which is secured to the motor means at one point and constrained to vibrate therewith, the resilient driving member being elongated .in a direction transverse to the direction of vibratory movement of said motor means and having a freely vibratory portion longitudinally removed from said one point, and said vibrated member being secured to the driving memher at the freely vibratory portion thereof. The vibratory movement generated at the motor means is thus communicated directly to the driving member, which results in a movement at the point of attachment thereof directly corresponding to the generated movement. while an augmented movement is produced at the freely vibrae tory portion of said driving member, to which the vibrated member is secured, which results in an accentuated vibratory movement of said vibrated member not limited to the stroke of the vibratory 6 motor means.

Further. objects of the invention'will be apparent from or will be specifically pointed out in the following description of one embodiment of the invention and important modifications there- I. of illustrated in the accompanying drawing, in reference whereto;

Fig. 1 is a sectional elevation of one form of the invention as applied to a screening device, taken on line l-l of Fig; 2;

Fig. 1a is a partly diagrammatic perspective view of a modified form of resilient driving means according to this invention; and

Fig. 2 is a transverse section thereof taken on line'2-'-2 in Fig; 1.

Referring particularly to Figs. 1 and 2, a suitable frame structure is indicated at I, which may comprise two parallel channel members la and lb to which the electromagnetic vibratory motor means may be secured, the frame and as- 26 sociated motor means being provided at each side of the vibrated member, as shown in Fig. 2. Each motor means may comprise an upper electromagnetic actuating member 2 and a lower actuating member 3, and armatures 4 and 5 asso- 3o ciated with the respective actuating means. The armatures l and 5 are shown as secured to a relatively rigid transverse connecting 'member 6, to which the vibrated member 1 is resiliently securedthrough the agency of a flexible and resilient as driving member 8. Said member 8 is shown as secured atv its ends to the vibrated member I as at 9 and II, and to the transverse connecting member 6 at a point intermediate such. ends, preferably adjacent the mid-length of said driv- ,0 ing member, said driving member being elongated in a direction transverse to the direction of vibratory movement of the armatures 4 and 5, and I being freely vibratory at allportions longitudinally removed from the point of attachment to 4,5 said transverse connectingmember.

The armature means i and 5 are mounted for resilient movement between the actuating members 2 and 3 in a suitable manner, as throughthe agency of an elongated resilient member l2 supso ported at its ends on the frame I, asby means of suitable brackets l3. As described in the abovementioned issued patent, the electromagnetic actuating means 2 and 3 are suitably associated with a source of electrical energy in such manner that alternate energization thereof is obtained, so that the connecting member 6 is caused to vibrate transverse to the length of the support member I2 upon energization of said motor means, due to electromagnetic attraction of the r'espective armature means 2 and 8.

Upon energization of the motor means, the center portion of the driving member 8 will be given a vibratory movement corresponding to the vibratory movement produced at the position of the armatures 2 and 3, which vibratory movement will be imparted to the vibratedmember I through resilient deformation of said member 8, said member bearing 'against the vibrated member only at its ends 9 and II, and being spaced therefrom intermediate such ends. The vibratory movement actually realized in the vibrated member I will therefore'not be limited by the stroke or amplitude of movement obtained at the midsection of said member 8, but will be dependent upon the mass of the vibrated member and its load andthe resilience of said member 8. In conventional structures wherein the vibrated member is mounted to vibrate purely in accordance with the vibratory movement of the motor means, it is necessary to adjust the period of the vibrating system so that the motor means is capable of producing the desired vibratory motion without undue power consumption. According to' the present invention, thereneed be no definite relation between the period of vibration of the ,vibrated assembly and that of the motor means inasmuch as any differences in the natural periods of the two parts of the apparatus will result mainly in a variation in the amplitude of vibratory movement of the vibrated member as the periods of the two portions of the apparatus pass into and out of resonance.

The resilient members 8 and I! may be formed of any suitable resilient material, and we preferably form the same of wood or a like material which is resistant to fatigue failure. ber I2 is preferably also resiliently mounted at its ends on the frame I as through the agency of resilient rubber cushion members I4 and I5 disposed at opposite sides of said member I! whereby stress intensiflcations are substantially eliminated at the point of attachment.

In the above-described form of apparatus, the resilient driving member 8 is shown formed as a single piece, connected to the motor means at its center and to the vibrated member at its ends. An equivalent structure may be obtained by employing two separate driving members 80 and'8b which, as shown in Fig. la, are each secured to the rigid transverse connecting member 6a at one end and may be secured to the vibrated member at their respective freely vibratory other ends 8a and Ila. In this figure the light arrows at the to the horizontal. as is common in vibratory.

position of the member to illustrate the vibratory movement directly realized from the vibratory motor means with which the structure is associated, and the heavy arrows at the portions 9a and Ila, illustrate the accentuated vibratory motion effected in the vibrated member. It will be apparent that the member 8a is comparable'tothe above-described connecting member 6 and may be similarly connected to electromagnetic vibratory motor means of the type shown in Figs. 1 and 2.

In the above-described form of apparatus, the respective vibrated members are shown inclined screen structures, but the particular angle of dis- The memposition thereof will be dependent upon the particular problem at hand. For example, in shaker devices it may be desirable to dispose the vibrated member on a horizontal plane and produce a V1- bratory movement therein having substantially no horizontal component, and in the case of vi: .bratory conveyors or the likeit may be desirable to dispose the vibrated member in a horizontal plane and incline the vibratory driving means at an angle thereto so that a vibratory movement having both vertical and horizontal components will be produced in the vibrated member.

In the'form of apparatus shown in Figs. '1 and 2,

the resilient support member 8 is shown extending longitudinally of the vibrated member. Obviously, the support member may extend transverse to the vibrated member if operating requirements should make this disposition more desirable.

Numerous modifications may be made in the application of the vibratory driving means of the .present invention, and the scope of the appended claims is not to be considered as limited to theherein-delineated forms of apparatus.

We claim:

1. A vibratory apparatus comprising a frame; a vibrated means; and a plurality of vibratory supporting means mounted on said frame and connected to said vibrated means and constituting substantially the sole support therefor; each of vibratory supporting means comprising a vibratory motor means secured to said frame and supported thereon, and a flexible elongated resilient driving member connected to said vibrated means in load-supporting relation at two longia ber being fixed to said frame means at its end portions, and electromagnetic actuating members -mounted on said frame means in operative association with said armature means to effect vibration of the center portion of said carrying member in a direction transverse to its length;

an elongated flexible resilient driving member, said driving member being elongated in a direction transverse to the direction of vibratory move-- ment of said-carrying member, and having its end portions rigidly secured to said vibrated member; rigid connecting means secured to the vibratory central portion of said carrying member and to the central portion of said elongated driving member for transmitting the vibratory movement of said carrying member to said driving member,

said driving member being capable of substantial resilient deformation by-vibratory impulses imparted thereto by said motor means through said connecting means, and said elongated flexible resilient driving member constituting supporting means for said vibrated member.

HUGH E. wtmznacn. CLYDE H. xenon). 

